Improvement in pipe-wrenches



H. REYN- Pipe-Wrench.

No. 218,195. Patented Aug. 5,1879,-

WIIIIIIHW Z0 66766519 3 lumen/Z02? UNITED STATES PATENT O EIoE.

HENRY RHYN, OF OMAHA, NEBRASKA.

IMPROVEMENT IN Pl PE-WRENCHES.

Specification forming part of Letters Patent No. 218,195, dated August5, 1879; application filed March .17, 1879.

To all whom it may concern:

Be it known that I, HENRY RHYN, ofOmaha, in the county of Douglas andState of Nebraska, have invented a new and useful Improvement inPipe-Wrenches, of which the following is a specification.

The object of my invention is a pipe-wrench constructed as fullydescribed hereinafter. to prevent the Wrench from slipping from thepipe, to insure a firm hold and ready operation, and preserve theoperating-spring, and permit ready application to the pipe.

In the drawings forming part of this specification, Figure l is anexternal view of the tool; Fig. 2, an edge view, and Fig. 3 a detachedsection.

D is the arm or lever, having at one edge two lugs, (J F, through whichextends the threaded rod G, the head I of which constitutes the bitingjaw or abutment of the tool. This head is rounded at the outer corner,at, for a purpose described hereinafter, and has bitingteeth.

The rod or stem G is threaded to receive a nut, H, which lies betweenthe lugs O F, and which may be turned to raise and lower the head, thestem G being prevented from turning by a feather, 0, extending into agroove, d, Fig. 3. To an arm, h, at the end of the lever D, is pivotedby a pin, B, the movablejaw A, constructed with two bearing-edges, y 3about at right angles to each other, and so arranged that when operatingupon a rod or tube their point of junction 20 will be directly upon aline, as, passing through the axis of the stem G.

A spring, b, fastened to the arm h, tends to throw the jaw A forwardover the abutment I. When the tool is applied to turn a pipe or rod, theedges 3 3 bear upon the same at points about equidistant from the lineas, and the head I, being adjusted, bears upon the opposite side of thetube at the point intersected by said line, as shown.

On' turning the lever in the direction of the hand without this positivebearing insuring only a limited play of the jaw A, it would be difficultto use the tool with one hand. Thus, in ordinary wrenches, where the jawbears on the spring, if the latter is weak and the weight of the tool isbrought on the jaw the latter will turn back and the tool slip from thepipe, rendering the use of both hands necessary.

If, to avoid this, the spring is made strong enough to resist the weightof the tool, the jaws are always pressed upon the pipe, and the latteris abraded in turning the tool on the same, and it is difficult andtiresome to work the tool.

By the construction described the jaw can turn back under a slightpressure, but not sufficientl y to permit the tool to slip from thepipe, while the spring will clamp the jaws on the pipe in turningforward. The spring, furthermore, is so concealed that it cannot beinjured by blows upon the tool or by striking the latter against hardsubstances.

I claim 1. The combination, in apipe-wrench, of the lever D, its lugs OF, stein G, carrying the head I and adjusting-nut H, and spring-jaw A,pivoted at B, having griping-faces y y, arranged at right angles, and aninclined face, t. arranged to bear on the end a of the lever when thejaw is thrown back, all as set forth.

2. The combination of the lever D, jaw I, pivoted jaw A, and spring b,arranged between the end of the lever and face if of the jaw A,

as set forth.

HENRY RHYN. Witnesses:

HENRY LAUER, JACOB MEYER.

